1 #include "read_fru_data.hpp"
2 
3 #include "fruread.hpp"
4 #include "types.hpp"
5 #include "utils.hpp"
6 
7 #include <host-ipmid/ipmid-api.h>
8 
9 #include <map>
10 #include <phosphor-logging/elog-errors.hpp>
11 #include <sdbusplus/message/types.hpp>
12 #include <xyz/openbmc_project/Common/error.hpp>
13 
14 extern const FruMap frus;
15 namespace ipmi
16 {
17 namespace fru
18 {
19 
20 namespace variant_ns = sdbusplus::message::variant_ns;
21 
22 using namespace phosphor::logging;
23 using InternalFailure =
24     sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
25 std::unique_ptr<sdbusplus::bus::match_t> matchPtr(nullptr);
26 
27 static constexpr auto INV_INTF = "xyz.openbmc_project.Inventory.Manager";
28 static constexpr auto OBJ_PATH = "/xyz/openbmc_project/inventory";
29 static constexpr auto PROP_INTF = "org.freedesktop.DBus.Properties";
30 
31 namespace cache
32 {
33 // User initiate read FRU info area command followed by
34 // FRU read command. Also data is read in small chunks of
35 // the specified offset and count.
36 // Caching the data which will be invalidated when ever there
37 // is a change in FRU properties.
38 FRUAreaMap fruMap;
39 } // namespace cache
40 /**
41  * @brief Read all the property value's for the specified interface
42  *  from Inventory.
43  *
44  * @param[in] intf Interface
45  * @param[in] path Object path
46  * @return map of properties
47  */
48 ipmi::PropertyMap readAllProperties(const std::string& intf,
49                                     const std::string& path)
50 {
51     ipmi::PropertyMap properties;
52     sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
53     auto service = ipmi::getService(bus, INV_INTF, OBJ_PATH);
54     std::string objPath = OBJ_PATH + path;
55     auto method = bus.new_method_call(service.c_str(), objPath.c_str(),
56                                       PROP_INTF, "GetAll");
57     method.append(intf);
58     auto reply = bus.call(method);
59     if (reply.is_method_error())
60     {
61         // If property is not found simply return empty value
62         log<level::ERR>("Error in reading property values from inventory",
63                         entry("INTERFACE=%s", intf.c_str()),
64                         entry("PATH=%s", objPath.c_str()));
65         return properties;
66     }
67     reply.read(properties);
68     return properties;
69 }
70 
71 void processFruPropChange(sdbusplus::message::message& msg)
72 {
73     if (cache::fruMap.empty())
74     {
75         return;
76     }
77     std::string path = msg.get_path();
78     // trim the object base path, if found at the beginning
79     if (path.compare(0, strlen(OBJ_PATH), OBJ_PATH) == 0)
80     {
81         path.erase(0, strlen(OBJ_PATH));
82     }
83     for (auto& fru : frus)
84     {
85         bool found = false;
86         auto& fruId = fru.first;
87         auto& instanceList = fru.second;
88         for (auto& instance : instanceList)
89         {
90             if (instance.path == path)
91             {
92                 found = true;
93                 break;
94             }
95         }
96         if (found)
97         {
98             cache::fruMap.erase(fruId);
99             break;
100         }
101     }
102 }
103 
104 // register for fru property change
105 int registerCallbackHandler()
106 {
107     if (matchPtr == nullptr)
108     {
109         using namespace sdbusplus::bus::match::rules;
110         sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
111         matchPtr = std::make_unique<sdbusplus::bus::match_t>(
112             bus,
113             path_namespace(OBJ_PATH) + type::signal() +
114                 member("PropertiesChanged") + interface(PROP_INTF),
115             std::bind(processFruPropChange, std::placeholders::_1));
116     }
117     return 0;
118 }
119 
120 /**
121  * @brief Read FRU property values from Inventory
122  *
123  * @param[in] fruNum  FRU id
124  * @return populate FRU Inventory data
125  */
126 FruInventoryData readDataFromInventory(const FRUId& fruNum)
127 {
128     auto iter = frus.find(fruNum);
129     if (iter == frus.end())
130     {
131         log<level::ERR>("Unsupported FRU ID ", entry("FRUID=%d", fruNum));
132         elog<InternalFailure>();
133     }
134 
135     FruInventoryData data;
136     auto& instanceList = iter->second;
137     for (auto& instance : instanceList)
138     {
139         for (auto& intf : instance.interfaces)
140         {
141             ipmi::PropertyMap allProp =
142                 readAllProperties(intf.first, instance.path);
143             for (auto& properties : intf.second)
144             {
145                 auto iter = allProp.find(properties.first);
146                 if (iter != allProp.end())
147                 {
148                     data[properties.second.section].emplace(
149                         properties.first,
150                         std::move(variant_ns::get<std::string>(
151                             allProp[properties.first])));
152                 }
153             }
154         }
155     }
156     return data;
157 }
158 
159 const FruAreaData& getFruAreaData(const FRUId& fruNum)
160 {
161     auto iter = cache::fruMap.find(fruNum);
162     if (iter != cache::fruMap.end())
163     {
164         return iter->second;
165     }
166     auto invData = readDataFromInventory(fruNum);
167 
168     // Build area info based on inventory data
169     FruAreaData newdata = buildFruAreaData(std::move(invData));
170     cache::fruMap.emplace(fruNum, std::move(newdata));
171     return cache::fruMap.at(fruNum);
172 }
173 } // namespace fru
174 } // namespace ipmi
175